Rotary valve for internal combustion engines



June 30, 1931. HARD|NG I 1,811,928

ROTARY VALVE FQR INTERliAL COMBUSTION ENGINES Filed May 15, 1929 2 Sheets-Sheet l 25 70 n Elwuawvtoz June 3-0, 1931. A. L. HARDING 1,811,923

ROTARY VALVE FOR INTERNAL COMBUSTiON ENGINES Fiied May 15. 1929 2 Sheets-Sheet z I awe/14m 3 Y. v9.15. mrdlna Z f F K attoznu o Patented June 30, 1931 UNITED STATES 1,s11,9za

PATENT ormce ALFRED L. HARDING, OF BRANSON, MISSOURI, ASSIG-NOR OF ONE-THIRD T0 LEE MOORE,

OF IBRANSON, MISSOURI Application filed May 15, 1929. Serial No. 363,259.

The present invention is directed to improvements in rotary valves for internal combustion engines.

The primary object of the invention is to provide a device of this character so constructed that the admission of explosive gases to the cylinder and the discharge of burnt gases therefrom can be controlled in a sim ple and practical manner.

Another object of the invention is to provide a valve of this type so constructed that wear thereof is reduced to a minimum.

Another object of the invention is to provide a valve of this kind wherein the burnt gases will be completely exhausted so as to permit a clean explosive mixture to enter the valve casing.

Another object of the invention is to pro vide a valve of this kind so constructed that the collection of carbon will have no detrimental eifect but will serve to effectively seal the valve for more effective operation.

With these and other objects in view, this invention resides in the novel features of construction, formation, combination and arrangement of parts to be hereinafter more fully described, claimed and illustrated in the accompanying drawings, in which:

Figure 1 is a vertical sectional view through a portion of a cylinder and its associated valve casing, showing the relative arnngement of the valve and cooperating parts.

Figure 2 is a plan'view of the valve seat.

Figure 3 is a bottom plan view of the valve.

Figure 4 is a developed sectional view on the line 44: of Figure 3.

Figure 5 is a sectional view on the line 55 of Figure 1.

Figure 6 is a sectional view on the line 66 of Figure 1.

Fig. 7 is a radial section of Fig. 2 from the center of the valve showing the connection between the port and the space above the valve, which are indicated by dotted lines in Fig. 1. I

Referring to the drawings, 1 designates a portion of a cylinder in which reciprocates the usual piston 2, there being a passage 3 which communicates with the valve casing 4,

nished with oil through the passage 11 formed in the casing in order that a film of oil may be present between the seat and valve 12, the superfluous oil draining through the passage 12 into the oil pan. The valve 12 is in the nature of a disc and has a neck or stem 13 for rotatably engaging the bearing 6. The lower end of the stem is provided with an extension 14 for detachably engaging the socket 15 formed in the collar 16 rotatable. with the drivinggearl? operable in the usual'manner by the timing. gear, not shown, to impart rotary movement to the valve 12. A spring l8'encircles the stem 13 and hasits upper end bearing against the-lower face of the casing K1, the lower end of said spring being seated upon 'aball bearing assembly 19 upon the stem, said assembly being retained in place by the split washer 20. This spring will obviously hold the valve 12 properly seated but will allow said valve to move slightly to accommodate expansion and retraction of the parts. 7 V p The seat 7 is provided with agroove 21 which serves to return the surplus joil'to the groove 10 for discharge .into the oil pan through the passage 12. V

The seat 7 has opening thereinto a main in- I let port 22- and an'auxiliary inlet port 23 and a main exhaust port 24: and an auxiliary exhaust port 25.. The valve 12 has formed therein a single opening 26 and is formed in its undersurface with a by-pass 27 which cooperates with the respective inlet and exhaust ports during rotation of the valve.

In Figure 1, the ports 24 and 25 are in registration with the opening 26 and by-pass 27, at which time the engine is exhausting. Obviously, the exhaust gases will pass over the valve 12, through the opening 26 and by-plass .27 an ugh h 1 9 2 an 2 which discharge into any well known type of manifold, not shown. On the intake stroke of the piston, the valve will rotate so as to cause registration of the opening 26 and by-pass 27.

The function of the by-pass 27 will be more clearly understood by again referring to Figure at and Figure 1. While the port 26 is the only port out completely through the valve and ordinarily its area would be the effective area of the outlet and inlet of gases at all times, it will be seen that when the port 26 is passing out of register with the port 24, the bypass 27 is beginning to register with the port 24 and the flow of gases from the space 3 is beginning to diminish through the opening 26, the flow is beginning to increase through the auxiliary port 25 which opens laterally into the space as shown in Figure 1, and this flow progressively increases as the flow through the port 26 diminishes until the time when the by-pass 27 passes out of register with the auxiliary port 25. Thus, it is clear that the bypass 27 permits of a longer period through which the exhaust port 24L in the valve seat is open or in communication with the space 3. On the exhaust stroke this permits of a more thorough purging of the burnt gases from the cylinder. On the intake stroke the by-pass 27 likewise permits of a longer period during which the space 3 is in communication with the inlet port 22 than would be the case were the single port 26 used without the bypass as will be understood.

By providing the auxiliary port 25 and bypass 27, the port area will be more effective during the time it is open to reduce back pressure to a minimum.

Since carbon will collect in the groove 9, the valve will be sealed thereby and will operate more effectively.

Owing to the increased port area of the exhaust ports the burnt gases will be quickly dispelled so as to in no way interfere with the incoming explosive charge upon the down stroke of the piston 2.

What is claimed is:

1. The combination with an internal combustion engine cylinder, of a casing carried thereby and communicating therewith, said casing having a seat therein, a valve rotatably mounted on the seat, means for rotating the valve, said casing having main inlet and exhaust ports and auxiliary inlet and exhaust ports, said valve having an opening therein communicating with a bypass, said opening and bypass being adapted to successively register with the respective inlet and exhaust ports during rotation of the valve.

2. The combination with an internal combustion engine cylinder, of a valve casing carried thereby and having communication with the cylinder, said casing having a bearing therein, a seat in the casing, a valve having a stem engaging the bearing, said valve being In testimony whereof I afiix my signature.

ALFRED L. HARDING. [11. s.] 

